*   Use `tensorflow::OkStatus()` instead of `tensorflow::Status::OK()`.
    *   Stop constructing `Status` objects from `tensorflow::error::Code`.
    *   One MUST NOT access `tensorflow::errors::Code` fields. Accessing
        `tensorflow::error::Code` fields is fine.
        *   Use the constructors such as `tensorflow::errors:InvalidArgument` to
            create status using an error code without accessing it.

            }
            values {
              dict_value {
              }
            }
          }
        }
        output_signature {
          dict_value {
            fields {
              key: "output_0"
              value {
                tensor_spec_value {
                  name: "output_0"
                  shape {
                    dim {